At 14 weeks of pregnancy, if the diarrhea is not severe, it will not have a great impact on the fetus. The 14 weeks of pregnancy is 3 and a half months, which is a relatively stable period and does not affect the fetus. However, if the diarrhea is serious and the number of bowel movements is high, the process of defecation may cause contractions and cramps in the uterus, which may lead to miscarriage. When diarrhea occurs, attention should be paid to determining the cause and condition of the disease and taking symptomatic treatment measures to avoid affecting the health of the pregnant woman and the growth and development of the fetus. During pregnancy, you should pay attention to keeping warm and not to eat cold fruits, cold drinks and greasy meat.